diff --git a/modules/eks-managed-node-group/README.md b/modules/eks-managed-node-group/README.md
index 82c3515..a0ca56e 100644
--- a/modules/eks-managed-node-group/README.md
+++ b/modules/eks-managed-node-group/README.md
@@ -120,6 +120,7 @@ module "eks_managed_node_group" {
| [create](#input\_create) | Determines whether to create EKS managed node group or not | `bool` | `true` | no |
| [create\_iam\_role](#input\_create\_iam\_role) | Determines whether an IAM role is created or to use an existing IAM role | `bool` | `true` | no |
| [create\_launch\_template](#input\_create\_launch\_template) | Determines whether to create a launch template or not. If set to `false`, EKS will use its own default launch template | `bool` | `true` | no |
+| [create\_placement\_group](#input\_create\_placement\_group) | Determines whether a placement group is created & used by the nodegroup | `bool` | `false` | no |
| [create\_schedule](#input\_create\_schedule) | Determines whether to create autoscaling group schedule or not | `bool` | `true` | no |
| [credit\_specification](#input\_credit\_specification) | Customize the credit specification of the instance | `map(string)` | `{}` | no |
| [desired\_size](#input\_desired\_size) | Desired number of instances/nodes | `number` | `1` | no |
@@ -162,6 +163,7 @@ module "eks_managed_node_group" {
| [name](#input\_name) | Name of the EKS managed node group | `string` | `""` | no |
| [network\_interfaces](#input\_network\_interfaces) | Customize network interfaces to be attached at instance boot time | `list(any)` | `[]` | no |
| [placement](#input\_placement) | The placement of the instance | `map(string)` | `{}` | no |
+| [placement\_group\_strategy](#input\_placement\_group\_strategy) | The placement group strategy | `string` | `"cluster"` | no |
| [platform](#input\_platform) | Identifies if the OS platform is `bottlerocket` or `linux` based; `windows` is not supported | `string` | `"linux"` | no |
| [post\_bootstrap\_user\_data](#input\_post\_bootstrap\_user\_data) | User data that is appended to the user data script after of the EKS bootstrap script. Not used when `platform` = `bottlerocket` | `string` | `""` | no |
| [pre\_bootstrap\_user\_data](#input\_pre\_bootstrap\_user\_data) | User data that is injected into the user data script ahead of the EKS bootstrap script. Not used when `platform` = `bottlerocket` | `string` | `""` | no |
diff --git a/modules/eks-managed-node-group/main.tf b/modules/eks-managed-node-group/main.tf
index b10b71e..dd924be 100644
--- a/modules/eks-managed-node-group/main.tf
+++ b/modules/eks-managed-node-group/main.tf
@@ -60,7 +60,7 @@ locals {
launch_template_name = coalesce(var.launch_template_name, "${var.name}-eks-node-group")
security_group_ids = compact(concat([var.cluster_primary_security_group_id], var.vpc_security_group_ids))
- placement = var.create && var.enable_efa_support ? { group_name = aws_placement_group.this[0].name } : var.placement
+ placement = var.create && (var.enable_efa_support || var.create_placement_group) ? { group_name = aws_placement_group.this[0].name } : var.placement
}
resource "aws_launch_template" "this" {
@@ -526,10 +526,10 @@ resource "aws_iam_role_policy_attachment" "additional" {
################################################################################
resource "aws_placement_group" "this" {
- count = var.create && var.enable_efa_support ? 1 : 0
+ count = var.create && (var.enable_efa_support || var.create_placement_group) ? 1 : 0
name = "${var.cluster_name}-${var.name}"
- strategy = "cluster"
+ strategy = var.placement_group_strategy
tags = var.tags
}
diff --git a/modules/eks-managed-node-group/variables.tf b/modules/eks-managed-node-group/variables.tf
index b5494e9..101e20b 100644
--- a/modules/eks-managed-node-group/variables.tf
+++ b/modules/eks-managed-node-group/variables.tf
@@ -276,6 +276,18 @@ variable "placement" {
default = {}
}
+variable "create_placement_group" {
+ description = "Determines whether a placement group is created & used by the nodegroup"
+ type = bool
+ default = false
+}
+
+variable "placement_group_strategy" {
+ description = "The placement group strategy"
+ type = string
+ default = "cluster"
+}
+
variable "private_dns_name_options" {
description = "The options for the instance hostname. The default values are inherited from the subnet"
type = map(string)
diff --git a/node_groups.tf b/node_groups.tf
index 457e903..26d5ed7 100644
--- a/node_groups.tf
+++ b/node_groups.tf
@@ -369,6 +369,8 @@ module "eks_managed_node_group" {
metadata_options = try(each.value.metadata_options, var.eks_managed_node_group_defaults.metadata_options, local.metadata_options)
enable_monitoring = try(each.value.enable_monitoring, var.eks_managed_node_group_defaults.enable_monitoring, true)
enable_efa_support = try(each.value.enable_efa_support, var.eks_managed_node_group_defaults.enable_efa_support, false)
+ create_placement_group = try(each.value.create_placement_group, var.eks_managed_node_group_defaults.create_placement_group, false)
+ placement_group_strategy = try(each.value.placement_group_strategy, var.eks_managed_node_group_defaults.placement_group_strategy, "cluster")
network_interfaces = try(each.value.network_interfaces, var.eks_managed_node_group_defaults.network_interfaces, [])
placement = try(each.value.placement, var.eks_managed_node_group_defaults.placement, {})
maintenance_options = try(each.value.maintenance_options, var.eks_managed_node_group_defaults.maintenance_options, {})